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Microsoft has a lot resting on the Lumia 950. It's the first smartphone the firm has released without the Nokia brand, and it has to prove Windows 10 as a truly universal operating system as Microsoft hopes that those with the software on their PC will opt for a smartphone that works in tandem with the OS.

Microsoft therefore needs the Lumia 950 to show that, unlike the previous Windows Phone 7 and 8 releases, Windows 10 Mobile has the chops, and more importantly the apps, to compete against iOS and Android, which currently account for a combined 98 percent of the global smartphone market.

DesignThe Lumia 950 is fairly uninspiring when it comes to design. The handset is available in black or white, and is made from matte polycarbonate that feels somewhat cheap. It lacks elegance and is prone to picking up smudges and fingerprints. It's fairly chunky too at 145x73x8.2mm and 150g.

Our biggest gripe, though, is how bland the handset feels compared with the likes of the Nokia-branded Lumia 920, which had outlandish polycarbonate packaging and a slightly curved 2.5D screen. Microsoft has so far failed to make much of a dent on the smartphone market, and we think this handset's dull design could see it struggle to stand out against its big-name competitors.

While it's not much to look at, the design of the Lumia 950 is certainly practical. The backplate can be removed, giving access to the battery and microSD slot. This also suggests that other, perhaps more colourful, backplates could be made available, but there's no word on this yet.

Display The design failed to impress, but the screen on the Lumia 950 is stunning. The 5.2in display, which is surrounded by a tiny bezel that gives it an almost edge-to-edge quality, has a Galaxy S6-rivalling 2560x1440 QHD resolution and comes with the AMOLED technology more typically associated with Samsung smartphones.